78587916736 has 56 divisors (see below), whose sum is σ = 187606513280. Its totient is φ = 31907872512.

The previous prime is 78587916733. The next prime is 78587916769. The reversal of 78587916736 is 63761978587.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78587916733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4607790 + ... + 4624813.

Almost surely, 2^78587916736 is an apocalyptic number.

78587916736 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78587916736 is an abundant number, since it is smaller than the sum of its proper divisors (109018596544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78587916736 is a wasteful number, since it uses less digits than its factorization.

78587916736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9232641 (or 9232631 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 67.

The spelling of 78587916736 in words is "seventy-eight billion, five hundred eighty-seven million, nine hundred sixteen thousand, seven hundred thirty-six".